Stats Being Updated

I use cfbstats for pulling weekly stats. I noticed several times where stats changed week to week (notably, tackles for loss). I'm trying to figure out if there is an error in my process and/or if that stat may get updated later in the week. Appreciate anyone's thoughts or insights on this.

For context, I pull all stats (i.e. the current and all prior weeks stats) each week, not just the most current week's stats, which is how I noticed the updates.

As someone who has gathered sports information for 20 years, I can tell you that if you expect the first batch of any great detail of stats to be 100% accurate, you're in for a disappointment. Often they get changes owing to mistakes or changes in the scoring. It's a credit to the source that they are still updating after the fact.